A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite

Nanocomposite structures, where the Fe, Fe2O3, or Ni2O3 nanoparticles with thin carbon layers are distributed among a single-wall carbon nanotube (SWCNT) network, are architectured using the co-arc discharge...

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Main Authors:	Nguyen Minh Hieu, Cao Van Phuoc, Truong Thi Hien, Nguyen Duc Chinh, Nguyen Duc Quang, Chunjoong Kim, Jong-Ryul Jeong, Dojin Kim
Format:	Article
Language:	English
Published:	MDPI AG 2019-09-01
Series:	Sensors
Subjects:	separated receptor and transducer hematite–carbon nanotube composite gas sensor
Online Access:	https://www.mdpi.com/1424-8220/19/18/3915

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spelling	doaj-baf66639cf7d4912a5a8e1424226f3fa2020-11-25T02:01:24ZengMDPI AGSensors1424-82202019-09-011918391510.3390/s19183915s19183915A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube CompositeNguyen Minh Hieu0Cao Van Phuoc1Truong Thi Hien2Nguyen Duc Chinh3Nguyen Duc Quang4Chunjoong Kim5Jong-Ryul Jeong6Dojin Kim7Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaNanocomposite structures, where the Fe, Fe<sub>2</sub>O<sub>3</sub>, or Ni<sub>2</sub>O<sub>3</sub> nanoparticles with thin carbon layers are distributed among a single-wall carbon nanotube (SWCNT) network, are architectured using the co-arc discharge method. A synergistic effect between the nanoparticles and SWCNT is achieved with the composite structures, leading to the enhanced sensing response in ammonia detection. Thorough studies about the correlation between the electric properties and sensing performance confirm the independent operation of the receptor and transducer in the sensor structure by nanoparticles and SWCNT, respectively. Nanoparticles with a large specific surface area provide adsorption sites for the NH<sub>3</sub> gas molecules, whereas hole carriers are supplied by the SWCNT to complete the chemisorption process. A new chemo-resistive sensor concept and its operating mechanism is proposed in our work. Furthermore, the separated receptor and transducer sensor scheme allows us more freedom in the design of sensor materials and structures, thereby enabling the design of high-performance gas sensors.https://www.mdpi.com/1424-8220/19/18/3915separated receptor and transducerhematite–carbon nanotube compositegas sensor
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Nguyen Minh Hieu Cao Van Phuoc Truong Thi Hien Nguyen Duc Chinh Nguyen Duc Quang Chunjoong Kim Jong-Ryul Jeong Dojin Kim
spellingShingle	Nguyen Minh Hieu Cao Van Phuoc Truong Thi Hien Nguyen Duc Chinh Nguyen Duc Quang Chunjoong Kim Jong-Ryul Jeong Dojin Kim A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite Sensors separated receptor and transducer hematite–carbon nanotube composite gas sensor
author_facet	Nguyen Minh Hieu Cao Van Phuoc Truong Thi Hien Nguyen Duc Chinh Nguyen Duc Quang Chunjoong Kim Jong-Ryul Jeong Dojin Kim
author_sort	Nguyen Minh Hieu
title	A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite
title_short	A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite
title_full	A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite
title_fullStr	A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite
title_full_unstemmed	A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite
title_sort	separated receptor/transducer scheme as strategy to enhance the gas sensing performance using hematite–carbon nanotube composite
publisher	MDPI AG
series	Sensors
issn	1424-8220
publishDate	2019-09-01
description	Nanocomposite structures, where the Fe, Fe<sub>2</sub>O<sub>3</sub>, or Ni<sub>2</sub>O<sub>3</sub> nanoparticles with thin carbon layers are distributed among a single-wall carbon nanotube (SWCNT) network, are architectured using the co-arc discharge method. A synergistic effect between the nanoparticles and SWCNT is achieved with the composite structures, leading to the enhanced sensing response in ammonia detection. Thorough studies about the correlation between the electric properties and sensing performance confirm the independent operation of the receptor and transducer in the sensor structure by nanoparticles and SWCNT, respectively. Nanoparticles with a large specific surface area provide adsorption sites for the NH<sub>3</sub> gas molecules, whereas hole carriers are supplied by the SWCNT to complete the chemisorption process. A new chemo-resistive sensor concept and its operating mechanism is proposed in our work. Furthermore, the separated receptor and transducer sensor scheme allows us more freedom in the design of sensor materials and structures, thereby enabling the design of high-performance gas sensors.
topic	separated receptor and transducer hematite–carbon nanotube composite gas sensor
url	https://www.mdpi.com/1424-8220/19/18/3915
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A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite

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